Filtering element



June 28, 1927. J' J. NAUGLE FILTERING ELEMENT Filed Jan. 12. 1924 EWI I NQ

| I I l x I I I l 1 I I l I I I I I I I I I Patented June 2s', 1927.

' UNITED STATES JOHN-'J'. NAUGLE, 0F BROOKLYN, 'NEW YOB'K.

FILTERING ELEMENT.

application led January 12, 1924. Serial No. 885,822.

My present invention relates to filtering elements, particularly, but not exclusively, such as are intended to be used in rotary filtering machines,.such as' the machine described and claimed in my co'pending application, Serial No. 685,820, tiled of even date herewith. It is an object of the present invention to provide filtering elements of the general character designated above which shall be simple in construction, easy and economical to fabricate; which shall be safe, convenient and efcient in operation; which shall have a maximum of `filtering surface in proportion to the entire area of the filtering element; which may readily be assembled and installed, and as readily disassembled and removed, as when the filtering cloth or bag surrounding the metallic portions of the filtering element is torn or ruptured, and which maybe shut olf and disconnected from the general iltrate-discharge system in a similar contingency; and which shall have other advantages subsequently set forth in detail herein.

In the accompanying specification I shall describe and in the annexed drawing show several illustrative embodiments of the present invention. It is, however, to be clearly understood that my resent invention is not limited to the speci c embodiments thereof herein shown and described for purposes of illustration only. v

Referring to the drawings, whereinI have shownV the aforesaid illustrative embodiments of the present invention:

Fig. l is a plan view, partly broken away, showing a complete filtering element;

Fig'. 2 is a. cross-sectional view of the taken along line 2-2 of Fig. 1;

Fig. 3 is a cross-sectional view ofthe same taken along line 3 3 of Fig. 1;

' Fig. 4 is a cross-,sectional view of the same taken along line 4-4 of Fig. 1;

Fig. 5 is a cross-sectional view of the same taken along line 5-5 of Fig. 1; and

Fig. 6 is a fragmentary plan view vof an- Same other embodiment ofthe present invention.l

Referring nowl to the aforesaid illustrative embodiments of the present invention and more particularly to the drawing showing the same, 10 indicates aV foraminous member, preferably made 'of metal, such as ametal screen. .Since the member 10 does not constitute the' filtering surface proper,

" but merely a support for the same, it should and preferably be quite coarse, so that the meshes of the screen are warped to a considerable extent to provide proper open spacing for the filtering member itself.

Associated with the metal-screen 10 is a peripheral binding member 20. The binding member 20 is preferably made of metal and is preferably U-shaped in cross-section, as shown more clearly in Fig. 2 of the drawing. In order to provide a maximum filtering surface for the filtering element of the present invention, and also that the filtering elem-ent may readily be cleansed by flowing cleaning water or other liquid throu h the element in a reverse direction to the irection in which the filtrate Hows through such element, I prefer that the material of the binding member 20 shall be perforated, as shown more clearly in Figs. 1 and 2 of the drawing. By making the peripheral binding member 20 of perforated metal or other material, that part of the filtering` member proper in contact with the peripheral binding member 20 can act efficiently as a filtering surface, and, conversely, when the filtering element as a whole is being cleansed, after a cycle of filtering operation, by the flow of water or other cleansing liquor in the reverse direction through the filtering element, the element will be cleaned not only along its central portions but even at its periphery. The advantages of this arrangement, both in the eliiciency of the ilterin element per square foot of total surface an in the ease and thoroughness with which the element can be cleansed after use will be at once apparent.` The peripheral binding member 20 may be readily attached to the screen 10 by any suitable metal-joining means, as by spot welding at the spots indicated by reference character 21 in Fig. 1 of erence characters 22,` to accommodate lthe reenforcing fitting member 30. The latter is now suitabl-y rigidly attached to the screen and to vthe peripheral binding member 2O by any suitable metal-joining process, as by spot welding at the points 3l indicated in F ig. l of the drawing.'

Cooperating with the screen 16 and with eachreenforcing fitting member 30, there being preferably two such reenforcing fitting members, is a flanged fitting member 40, more clearly shown in Figs. l, 4 and 5 of the drawing. For this purpose the reenforcing fitting member 36 is preferably cut away, as indicated by reference characters 41,'to accommodate the flanged fitting member 40, the latter having the flanged portions '42 and 43 and the transverse web portion 44, The web portion 44 is provided with the threaded openings 45, of which two are preferably provided, to accommodate the assembly bolts subsequently described, and with the central discharge opening 46. The flanged fitting member is preferably rigidly connected to the screen and to the associated reenforcing fitting member 30 by brazing or any other l suitable metal-joining processa Passing over the screen 10, the peripheral binding member 20, the reenforcing fitting members 30, and the associated fianged tting members 40, is the filtering member proper, generally indicated by reference character 50, and referably consisting of a cotton cloth bag ofI the desired strength and fineness or coarseness of texture, depending upon the nature of the particular liquid being filtered and the desired completeness or roughness of the filtering operation., The bag is preferably initially closed at three sides, the fourth side, indicated by reference character 51, being open so as to enable the bag to receive the metal screen 10 and the associated metal parte After the metal screen 10 andthe associated metal arts have been passed into the bag 50 throng the open end 5l, the material of the bag at the open end is folded over and sewed firmly into place by a coarse thread forming the seam '52 The portion 53 vof the bag 50 overlying each of the flanged fitting members 40 is roughly perforated adjacent the threaded openings 45, intended to accommodate the assembly bolts, and the discharge opening 46. This portion 53 of the bag 50 serves asa gasket between the respective flanged fitting mem bers 40 and the fittings now to be described.l

The fitting 60, which comprises the discharge passage means for the filtrate pass.

ing through the filtering cloth 50, along the screen 10, through the perforations of the pe ripheral binding' member 20 and the ren enforcing fitting members 30, and out of the -filtering element throu h the discharge pas-` sages 46 in the flange fitting members 40, comprises the flanged base portion '61 provided with the apertures 62 for receiving the essence Shanks of the bolts, and the entrance 63 for the filtrate. Forming a'n extension of the base plate is the tubular or pipe portion 64 which leads to the transverse tubular portion 65, the portions A64- and 65 forming a sort of T-fitting. The tubular portion 65 is provided with the annular filtrate-receiving channel or passage 66 on the interior face thereof. The remaining fitting 67 at the opposite side of the filtering element is preferably without a filtrate-receiving channel in its inner face, so that it `serves merely to help to mechanicallyI support the filtering element, but without serving as a discharge passage for filtrate. However, if desired, the fitting 67 may be constructed similarly to the fitting 60, so that filtrate may be discharged through both sides rather than merely through one side of the filtering element.

The fittings 60 and 67 are now attached to the filtering element by means of the bolts 70 which pass through the openings 62 in the flanged base portion 61 of each fitting` through the rough openings in the portions 53 of the filtering cloth intended to receive the Shanks of 'the bolts, and into the threaded openings 45 of the flanged fitting members 40 intended to receive the lower ends of the bolts 70. The bolts are provided with heads indicated ,by reference character 7l, thus enabling the bolts to be operated to assemble or disassemble the filtering element as a whole The advantages of the foregoing construction are numerous and of great practical importance. The filtering element of the present invention is very simple in construction and may readily and economically be fabricated by simple apparatus with a great economy of material, time, labor and equipment. The resulting filtering element is of a very strong and rugged construction, so that it. may safely, conveniently and efficiently be handled, rotated or otherwise operated. The filtering element has a marximum of effective filtering surface in proportion to the total area of the filtering element, due, in part, to the perforations in the peripheral binding member and in the associated reenforcing fitting members.7

The filtering element may be very rapidly assembled and as readily disassembled and removed should any occasion arise for the quick and speedy removal of such element. For example, in the emergency of the filtering cloth becoming worn ont or, accidentally luth lill

lill) or otherwise torn or ruptured, the filtering y element is of such construction that it may be readily removed, together with its associated fittings, so that a new and perfect element may loe-very quickly installedc The filtering element may also be very readily shut off or disconnected from the usual fil trate discharge system in a similar contingency'n Since each filtering element has its individual discharge fittin or fittings, it may be readily cleansed f y the flow of cleansing water or other liquorin a reverse direction through the filtering element, that is, into the interior of the element andeutwardly through the filtering cloth. This causes the cloth to expand and thus to throwv off the adherent deposit. This cleansing action is facilitated and rendered all the more complete by reason of the perfor-ations in t-he peripheral binding member and in the reena slight modification of the filtering element.

in which the filtering element is extended s0 as to have two segmental circular portions at the edges included between the edges carrying the fittings for the filtering element. Such a filtering element, generally designated by reference character 80, has the segmental circular portions 81, but is otherwise constructed exactly in the manner of the filtering element already described. This filtering element has the advantagethat by its use an increase of about twenty per cent (20%) in filtering surface is obtained Without sacrificing any of the advantages in construction and operation 0f the filtering element previously described. It is to be understood that the term perforated wherever appearing in the specification. and claims is intended to include also foraminous or pervious members and materials made otherwise than by perforating the materials of which such members are made or of which such materials consist.

What I claim as my invention is:

1. A filtering element comprising a metal screen provided with an edge binding of U- shaped cross-section and consisting of perforated metal.

2. A filtering element comprising a sheet screen welded thereto, and reenforcing fit-v ting members also of metal and likewise welded to said screen. v c

5. A filtering element comprising a metal screen, a peripheral binding of `perforated metal' for said screen welded thereto, and

reenforcing fitting members also of perforated metal and likewise welded to said screen.

6. A filtering element c'omprisingJa metal screen, a peripheralv binding of -shaped cross-section and consistin of 'perforated metal for said lscreen wel'ed thereto, and reenforcing fitting members also of U-shaped cross lsection and vconsisting of perforated metal and likewise welded to said screen.

7. A filtering element comprising a metal screen, a peripheral binding of U-shaped cross-section and consisting, of perforated metal for said screen weldedthereto, and reenforcing lfitting members also of U- shaped cross-section and consisting of perforated metal and likewise welded to said screen.

8. A filtering element comprising a metal screen, a peripheral binding OfU-Shaped cross-section and consisting of perforated metal for said screen welded thereto, and reenforcing fitting members also of U-shape'd cross section and consisting of perforated metal and likewise welded to said screen, and a flanged fitting member having the flanged portions thereof fittin over each of said reenforcing fitting mem ers.

9. A filtering element comprising a metal screen, a peripheral binding of perforated metal for said screen Welded thereto, and reenforcing fitting members also of metal and likewise welded to said screen, and a flanged fitting member having the flanged portions thereof fitting over each' of said reenforcing fitting members.

10. A filtering element comprising a metal screen, a peripheral binding of U-shaped cross-section and consisting of perforated metal for said screen welded thereto, and reenforcing fitting members also of U- shaped cross-section and consisting of perforated metal and likewise welded to said screen, and a flanged fitting member having the flanged portions thereof fitting over each of-said reenforcing fitting members.

11. A filtering element comprising 'a metal screen, a peripheral binding of metal for said screen Welded thereto, and reenforcing fitting members also of metal and likewise welded to.said screen, and a flanged fitting member having the flanged portions thereof fitting over each of said reenforcing fittingmembers.

12. A metal screen, a peripheral binding of U- shaped cross-section and consisting of perforated metal for said screen welded thereto, and reenforcing fitting members also of U-shaped cross-section and consisting of perforated metal andl likewise welded to said screen, and a fianged fitting member having the flanged portions thereof fitting over each of said reenforcin fitting members and being securely attac ed thereto, said periphfiltering element comprising a e eral binding member being cnt away adjacent said reenforcing fitting members to accommcdate said reenforcing fittin members and said reenforcing fitting mem ers being cut away adjacent said flanged fitting members to accommodate said flanged fitting members.

13. A lilterin element comprising a metal screen, a perip eral binding of U-shaped cross-section and consistir] .of perforated metal for said screen wel( ed thereto, and reenforcing fitting members also of U-sha-ped cross-'section and consisting of perforated metal and likewise welded to said screen, and aflanged fitting member having the flanged portions thereof :fitting over each of said reenforcin fitting members and being securely attac ied thereto, said peripheral bindingmember being clit away adjacent said reenforcing fitting members to accommodate said reenforcing fitting meinbers and said ieenforcing fitting members being cut away adjacent said flanged fitting members to accommodate said flanged fitting members.

14. A filtering element comprising a meta-l screen, a peripheral binding of metal for said screen welded thereto, and reenforcing tting members also of metal and likewise welded to said screen, and a flanged fit-ting member having the flanged portions thereof fitting over each of'said reenforcing fitting members andbein securely attached thereto, 'said peripheral inding member being cut away adjacent said reenforcing fitting members to accommodate said reenforcing fitting members and said reenforcing fitting members being cut away adjacent said flanged fittin members to accommodate said flan ed tting members.

15. A filtering e ement comprising a metal screen, a peripheral bindin of perforated metal for said screen wel ed thereto, and reenforcing fitting members also of metal and likewise welded to said screen, and a flanged fitting member having the Yflanged portions thereof tting over each of said reenforcing fitting members and being securely attached thereto, said peri heral binding member being cut away a jacent said reenforcing fitting members to accomlmodate said reenforcing fitting members and said reenforcing fitting members being cut away adjacent said flanged fitting members to accommodate said flanged fitting members.

16. .A filtering element comprising a metal screen, a peripheral binding of U- shaped cross-section and consisting of perforated metal for said screen welded thereto, and reenforcing fitting members also of U-shaped cross-section and consistin of perforated metal and likewise weide to said screen, and a hanged fitting member having the dang-ed portions thereof fitting over each of said reenforcing -iitting .mem-

for said screen welded thereto, and reenforcing fitting membersfalso of metal and likewise welded to said screen, and a lianged fitting member having the flanged portions vthereof fitting over each of said reenforcing fitting members and being securely attached thereto, said peripheral binding member being cut away adjacent said reenforcing fitting members to accommodate said reenforcing fitting members and said reenforcing fitting members being cut away adjacent said flanged fittingmembers to accommodate said flanged fitting members, in combination with a filterin cloth surrounding said screen, peripheral inding member, reenforcing iittin members and flanged fitting members, and a plurality of connection members each overlying a portion of said filtering cloth, whic portion serves as a gasket, and conigected with one of said flangedl tting memers. Y

18. A filtering element comprisin a metal screen, a peripheral binding o U- shaped cross-section and consisting of perforated metal for said screen Welded there- "to, and reenforcing fittin ymembers also "of sol accommodate said reenforcing fitting memi bers and said lreenforcing littin members being ciit away adjacent said i' anged fittin members to accommodate said flanged fitting members, in combination with a filtering cloth surrounding said screen, pe-

ripheral binding member, reenforcing fittin members and flanged fitting members, an a plurality of connection 'members each overlying a portion of said filtering cloth,

which portion serves as a gasket, and con- 1greeted with one ofv said ilangedfiitting memers.

19. A filtering element comprising a metal screen, a peripheral binding of perforated metal for said screen welded thereto, Aand reenforcing littin members also of metal and likewise wel ed to vsaid screen, and a flanged fitting member having the flanged portions thereof fitting over each of said reenforcing ttingmembers and being securely attached thereto, said peripheral binding member being cut away adjacent said reenforcing fitting members to accommodate said reenforcing fitting `members and said reenforcing fitting members being cut away adjacent said flanged fitting members to accommodate said flanged fitting members, in combination with la filtering cloth surrounding said screen, peripheral binding member, reenforcin fitting members and flanged fitting mem ers, and a plurality of connection members each overlying a portion of said filtering cloth, which `portion serves as a gasket, and connected with one of said flanged fitting members.

20. A filtering element comprising a metal screen, a peripheral binding of perforated metal for said screen welded thereto, and reenforcing fitting members also of metal and likewise welded to said screen, and a flanged fitting member having the anged portions thereof fitting over each of said lreenforcing fitting members, in combination with a filtering cloth surrounding said screen, peripheral binding member, reen` forcing fittin members and flanged fitting members, lan a plurality of connection members each overlying a portion of said filtering cloth, which portion serves as a gasket, and connected with one of said flanged fitting members.

21. A filteringlelement comprising a metal screen, a v`perip eral binding of U-shaped cross-section and consisting of perforated metal for said screen welded thereto, and reenforcing fitting members also of U-shaped cross-section and consisting of perforated metal and likewise welded to said screen, and a flanged fitting member having the flanged portions thereof fitting over each of said reenforcing fitting members, in com- -bination with a filtering cloth surrounding said screen, peripheral binding member, reenforcing fitting members and flanged fitting members, and a plurality of connection members each overlying a portion of said filtering cloth, which portion serves as a gasket, and connected with one of said flanged fitting members.

22. A filtering element comprising a metal screen, a peripheral binding of U-shaped cross-section and consistin of perforated metal for said screen wel ed thereto, and reenforcing fitting members alsofof U-shaped cross-section and. consisting of perforated metal and likewise welded to said screen, and a flanged fitting member having the flanged portions thereof fitting over each of said reenforcing fitting members and being securely attached thereto, said peripheral binding member being cut away a jacent said reenforcing fitting members to accommodate said reenforcing fitting members land said reenforcing fitting members being cut away adjacent said flanged fitting members to accommodate said flanged fitting members, inl combination with a filtering cloth surrounding said screen, peripheral bindin member, reenforcing fitting members an flanged fitting members, and a plurality of connection members each overlylng a portion of said filtering cloth, which portion serves as a gasket, and connected with one of said flanged fitting members.

23.l A filtering element comprising a metal screen, a peripheral binding of metal for said screen welded thereto, and reenforcing fitting members also of metal and likewise welded to said screen, and a flanged fitting member having the flanged portions thereof fitting over each of said reenforcing fitting members, in combination with a filtering cloth surrounding said screen, peripheral binding member, reenforcing fitting members and flanged fitting members, and a plurality of connection members each overlying a portion of said filtering cloth, which portion serves as a gasket, and connected with one of said flanged fitting members.

In testimony, whereof, I have signed my name to this specification this 23rd day of August, 1923.

JOHN J. NAUGLE. 

